M site/contents/reference-num.md → site/contents/reference-num.md

@@ -55,4 +55,7 @@ {#op||succ||{{i1}}||{{i2}}||
 Returns the successor of {{i1}}.#}
 
 {#op||sum||{{q}}||{{i}}||
-Returns the sum of all items of {{q}}. {{q}} is a quotation of integers. #}+Returns the sum of all items of {{q}}. {{q}} is a quotation of integers. #}
+
+{#op||product||{{q}}||{{i}}||
+Returns the product of all items of {{q}}. {{q}} is a quotation of integers. #}